package e8;

public class E8 {
    public static void main(String[] args){
        System.out.println("1添加-------");
        add();
        System.out.println("2.删除------");
        remove();
        System.out.println("3.修改-------");
        alter();
    }
    public static void add(){
        StringBuffer sb=new StringBuffer();
        sb.append("itcast");
        System.out.println(sb);
        sb.insert(2,"123");
        System.out.println(sb);
    }
    public static void remove(){
        StringBuffer sb=new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果："+sb);
                sb.deleteCharAt(2);
                System.out.println("删除指定位置结果："+sb);
                sb.delete(0,sb.length());
                System.out.println("清空缓冲区结果："+sb);
    }
    public static void alter(){
        StringBuffer sb=new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符结果："+sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定位置字符结果："+sb);
        System.out.println("字符串反转结果："+sb.reverse());
    }
}
